Fuse-plug.



UNITED STATES` SIDNEY ROTHSCHILD,

PATENT OEEicE.

OF NEW YORK, N. Y.

FUSE-PLUG.

SEECIFICATION forming part of Letters Patent No. 723,032, dated'March17, 1903.

Application filed June 23, 1902.

To a/ZZ whom; it m/fty con/06172,:

Be it known that I, ASIDNEY RorHsoHILD, a citizen of the United States,and a resident of the city of New York, borough of Manhattan, in thecounty and Stateiof New York, have invented a new and ImprovedFuse-Plug, of which the following is a full, clear, and exactdescription.

The invention relates to conductors of electricity having an interposedfuse of lead or other metal capable of destruction by an excessivecurrent.

The object of the invention is to provide a new and improvedfuse-plugwhichl is simple and durable in construction, cheaptomanufacture, easily repaired in case the plug burns out, and arranged toinsure a secure connection between the ends of the circuit-Wires to bejoined.

The invention consists of novel features and parts and combinations ofthe same, as will be more fully described hereinafter and then pointedout in the claims.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure l is a side elevation of the improvement, showing thecasing-cover in section. Fig. 2 is a transverse section of the same onthe line 2 2 of Fig. l, and Fig. 3 is a sectional plan view of the sameon the line 3 3 of Fig. 2.

The casing A of the fuse-plug is made of porcelain or other suitablenon-conducting material and is formed at its bottom with a dependingflange A', through which extend from opposite sides conductingwireterminals B B', secured inside of the casing to posts() C'Y in the shapeof bolts held loosely in openings in the casing, as plainly indicated inFig. 2. The bolts C C' are slotted at their upper ends to receive thelower ends of the conducting or contact plates D D', adapted to beconnected with each other at their free ends by a fuse in the shape of aring E, of lead or other metal having a low melting-point- The plates DD' are preferably made of spring metal and extend on opposite sides ofthe post A2, forming part of the casing A and provided on opposite sideswith recesses A3, eX- tending upwardly and inwardly to receive Serial No112,806.

corresponding V- shaped tongues D2, struck up from the plates D D', nearthe free ends thereof, so that when the nuts C2 of the bolts ,C C' arescrewed up then the tongues D2 are moved in firm engagement with thewalls of the recesses A2 to securely holdthe plates D D' in position attheir upper ends on opposite sides ofthe post A2. The casing-cover F isin the shape of an inverted cup and is likewise made of porcelain orsimilar non-conducting material, and on the under side of the top of thecover is formed a lug F' i-n the shape of a frustum of a cone, fittinginto a correspondingly-shaped recess in the upper end of the post A2, soas to hold the cover F in proper position relative to the casingto'securely inclose the fuse-ring E, plates D D', and the upper ends ofthe bolts or posts O O'. It will be noted that the post A2 is tapered orconical and that the spring-plates D D' conform to the shape of thepost. Now in case a fusering E burns out it is only necessary for theoperator in charge to remove the cover F, place a new fuse-ring over theupper end of the post A2, and slip the ring upon the free ends of theplates D D', so as to connect the same with each other by means of thering. The plates D D' may be provided near their upperends with smalllugs D3 to prevent the ring E from slipping down too far on the platesvD D'.

From the foregoing it will be seen that the device is very simple anddurable in construction, cheap to manufacture, and convenient (Nomodel.)

"access is had to the various parts to permit making repairs wheneverthey are necessary.

Having thus described my invention, I claim as new and desire to secureby Letters Patentl. The combination, with a fuse-plug post of thespring-metal plates arranged on opposite sides of the same and curvedinward at their upper ends, the same forming the terminals of anelectric circuit, and a fuse-ring made of such diameter that it isadapted to pass over the extremities of saidplates before coming incontact with adjacent portions of the same, substantially as shown anddescribed. I

2. A fuse-plug having a casing of non-conducting material ,provided witha central post, conducting-plates on opposite sides of the IOO saidpost, and a fuse-ring slipped over the post, to engage the free ends ofthe said plates, to connect the latter with each other, as set forth. i

3. A fuse-plug'having a casing of a non-conducting material, bolts heldadjustably in the said casing and arranged to receive the terminals ofcircuit-Wires, spring-plates held on the said bolts, and extending onopposite sides of the casing, and a fuse-ring adaptedY to engage thefree ends of the said plates, as set forth. Y

4. A fuse-plug having a casing of a non-couducting material and providedwith a central Y post having recesses on opposite sides, bolts held onthe said casing, plates securedfon the said bolts and having tonguesengaging the said recesses, and a fuse-ring for engaging the free endsof the said plates, as set fort-h.

5. A fuse-plug having a casing provided with a central post, a removablecover for the said casing, having a lug engaging a recess in the upperend of the said post, bolts held .in the said casing and extendingWithin the SIDNEY ROTHSCHILD.

Witnesses: i

HARVEY FLEMING, JOHN C. BEHLMER.

